Adjustment of nippers for combing frames



Oct; 29, 1963 c, $HLE|FER 3,108,333

ADJUSTMENT OF NIPPERS FOR COMBING FRAMES Filed Aug. 50, 1960 INVENT OR Carlo Schleifer BY @Ma ATTORNEY United States Patent l Italy Filed Aug. 30, 1969, Ser. No. 52,981 Claims priority, appiication Italy Sept. 4, 1959 6 Claims. (Cl. l9-235) My invention has for its object an arrangement for the speedy adjustment of the position of the nippers with reference to the circular comb in a rectilinear frame adapted to comb long fibres.

In rectilinear frames for the combing of long fibres and, in particular, in the case of combing frames of the Hellmann type, the adjustment of the height of the nippers with reference to the circular comb is of essential importance; said nippers comprise an upper and a lower Said adjustment was hereto-fore made by skilled workers with shim-s beneath the opposite ends of the shaft carrying the nippers. The nippers were then locked in position by the fastening of threaded bolts while the final adjusting movements are obtained by micrometric screws.

Obviously, such an arrangement, in addition to its being left to the judgment of the workman, does not guarantee a perfect constancy, during a long period, of the location of the nippers with reference to the circular comb and, in fact, vibrations may lead to a change in the position assumed by the axis of the nippers with reference to the generating lines of the circular cornb.

This results in an irregular combing of the heads of the fibre bunches held by the nippers and in an increase of the Waste material produced by the combing operation.

My invention has for its object to leave the necessary adjustment no longer to the judgment of the workman and to resort to an arrangement of a simple structure, the use of which ensures an accurate lasting adjustment, of the position of the nippers with reference to the circular comb.

According to my invention, this is obtained by securing the entire nippers to (two stationary pivots, through the use of supports carrying at suitable points the lower jaw of the nippers, while the position es to height of the supports with reference to the stationary pivots is adjustable.

The supports carrying the nippers are each in the shape of an arm, the lower end of which is pivotally secured to the lower jaw of the nippers, while its upper end is carried by the corresponding stationary pivot with the insertion therebetween of an intermediate member which is shiftable with reference to the stationary pivot and is shaped so as to allow a modification the position of the cooperating arm and of the nippers with reference to the stationary pivot, and thereby also of the actual nippers with reference to the circular comb, in a manner corresponding to the position of the intermediate member with reference to said cooperating stationary pivot.

The above-mentioned intermediate member is provided with means adapted to lock it in a predetermined position corresponding to a predetermined position of the nippers, with reference so the circular comb, and it is also provided with a scale of distances between the nippers and the circular comb. The scale registers with a stationary reference mark, with a. view to allowing a speedy adjustment and control of the position of the nippers with reference to the circular comb.

The intermediate member may be an eccentric sleeve inserted between the cooperating stationary pivot and the upper end of the arm and the eccentricity of which may be adjusted by causing it to rock with reference to the dfihhfifi Patented et. 29, 1963 pivot and to the arm supporting the nippers. The arrangement also includes a pin adapted to lock the eccentric member in a predetermined position and a scale of heights for the nippers with reference to the ends of the needles on the circular comb, said scale cooperating with reference marks.

The pin is preferably inserted in an opening passing through the stationary section of the frame and it may enter selectively one of the holes formed along an armate line on a flange of the sleeve. The flange canries along its periphery a scale of heights of the nippers with reference to the circular comb and is adapted to be shifted with reference to a mark carried by the stationary section of the frame during the angular movement of the eccentric sleeve, or else, the comb may be shifted vertically by resorting to a wedge carrying a scale and provided with holes adapted to be engaged selectively by a reference pin to be introduced into a stationary section of the frame.

After executing a first adjustment during the fitting of the frame by the builder, the user has only to execute the very simple operation consisting in introducing the pin into the hole located in registry with the subdivision of the scale corresponding to the desired height to be given to the nippers with reference to the circular comb.

Of course, the adjustment should be executed at both ends of the nippers, since this is the only manner of 0btaining reliably the location of the lower end of the jaw at a constant distance from the periphery of the circular comb throughout the breadth of the latter.

Furthermore, since there are no further members to be secured by screws, which are always liable to be misadjusted during operation, it is possible to reliably define and adjust the position of the nippers through introduction of the pin in the corresponding hole, without any possibility of an undesired change.

Other features and advantages of the invention will appear clearly in the reading of the following description, reference being made to the accompanying drawings illustrating by way of example and by no means in a limitiug sense, preferred embodiments of my invention.

In said drawings:

FIG. 1 is a diagrammatic side view of certain essential parts, including the nippers and the circular comb, of a rectilinear frame for the combing of long fibres;

FIG. 2 is a cross-section view taken on line II-II of FIG. 1;

FIG. 3 is a fragmentary plane view from above of the parts of the machine illustrated in FIG. 1 and FIG. 4 is a diagrammatic elevation view of a rectilinear frame for combing long fibres according to a modified embodiment of the invention.

in the drawings, 1 designates the lower jaw of the nippers and Z designates its upper jaw. The reference character 3 designates the circular comb fitted on a shaft 4 and provided with needles 5, while 6 and 7 illustrate the rectilinear comb and the group of drawing cylinders, respectively.

The lower jaw '1 of the nippers is carried by an arm 8, while the upper jaw 2 is carried by an arm 9. The arms 8 and 9, which rock with reference to each other, and are pivotally secured to the spindle 10, of which the ends 10a are carried on either side of the nippers by an arm 11, pivotally secured to an eccentric member 12.

The latter is caried revolvably on a pivot 13 secured through the nut id to the stationary section 15 of the frame. The eccentric member "12 includes a flange 12a which is provided with a series of holes 16 arranged in arcuate formation round the axis 1'7 of the pivot '13. The part 15a of the stationary section of the frame is formed with an opening passing through said part and inside which is inserted a pin d8, the tip of which engages selectively one of the holes =16. According to the position of the m] holes 16 with reference to the opening passing through the stationary section and housing the pin 18, the relative position as to height of the axis 17 of the pivot 13 with reference to the axis 19 of the eccentric member 12 will vary and thereby the relative position of the nippers 2 with reference to the circular comb 3.

In order to help the user when executing said adjustment, there is provided at the periphery of the flange 12a of the eccentric member a scale, the subdivisions of which are gauged in values giving the position of the nippers with reference to the circular comb. On the upper end of the part a of the stationary section of the frame, there is provided :a stationary reference mark 20 (FIG. 3).

Of course, the arcuate series of holes 16 may be provided in the part 15a of the stationary section 15, in which case the flange 12a of the eccentric member will be provided with a single opening and the pin is introduced through said single opening in said flange in a direction opposed to that illustrated in FIGS. 2 and 3.

1n the embodiment shown in FIG. 4 the upper ends of the arms '11 are hinged at 13 to lugs 21 slidable within vertical guides 2 and bearing upon wedges 23 which may be displaced horizontally by acting upon the threaded member 2 4 rotatably mounted in a lug 15b of the stationary structure 15. 25 through which passes a pin 26 which can be inserted in a bore provided in the stationary structure 15. The wedges have marked thereon scales 27 cooperating with a reference mark 28 provided on the stationary structure 15.

It should be well understood that, without widening the scope of the invention as defined in the accompanying claims, it is possible to modify the structural details and the arrangement of the parts with reference to the embodiments described and illustrated.

What I claim is:

1. In a rectilinear frame for combing long fibres having a stationary structure, and fibre nippers comprising a lower jaw and an upper jaw movable with respect to said lower jaw, a support for sustaining each end of said fiber nippers, a cooperating circular comb arranged below the end portion of said lower jaw, means for sustaining said support in said stationary structure and for speedy adjustment of the position of the fibre nippers above the circular comb, said means comprising a movable intermediate member interposed between each of said supports and said stationary structure, and means for locking said intermediate member in a position corresponding to a desired height of said nippers above the circular comb, a scale on said intermediate member gauged in the heights of said nippers above said circular comb, and a marking on said stationary structure for cooperating with said scale.

2. A rectilinear frame as set forth in claim 1, wherein said intermediate member is constituted by a pair of eccentric sleeves, a pivot for each sleeve rigid with said stationary structure for rotatably supporting said eccen- Each wedge 23 has cross-bores 2;- tric sleeves, and arms for supporting said nippers, the upper ends of said arms being rotatably connected to said eccentric sleeves and the lower ends carrying the lower jaw of said fibre nippers.

3. A rectilinear frame as set forth in claim 2, wherein the eccentric sleeves are each provided on its side facing the stationary structure of the frame with a flange coaxial with the stationary pivot revolvably carrying said sleeve, said flange being provided with an arcuate series of holes parallel with the axis of said sleeve and preferably spaced at uniform intervals, the stationary structure of the frame being provided with an opening passing through it and receiving a reference pin, the axis of which is spaced from the axis of the stationary pivot by an amount equal to the spacing between the last-mentioned axis and the axes of the holes of the arcuate series of holes formed in the flange on the eccentric sleeve, whereby the rotation of the latter provides for the selective registry between the holes in the flange and the opening in the stationary structure, so that the tip of said pin may thus enter the hole registering with the opening and lock the eccentric sleeve in a desired angular position corresponding to a predetermined height of the nippers with reference to the circular comb.

4. A rectilinear frame as set forth in claim 3, wherein on the periphery of the flange on each eccentric sleeve the scale is provided gauged in values of the height of the nippers with reference to the circular comb, the stationary reference marking cooperating with said scale being provided on the section of the stationary structure in which is formed the opening engaged by the pin.

5. A rectilinear frame as set forth in claim 1, wherein the intermediate member is constituted by a wedge adapted to be shifted with reference to the stationary section of the frame and provided with a series of holes, whereby it is possible to lock said wedge in its adjusted position by means of a pin, the end of which engages an opening formed in the stationary structure of the frame and the cooperating hole.

6. A rectilinear frame as set forth in claim 5, wherein the wedge carries the scale gauged in heights of the nippers with reference to the circular comb, said scale registering with the stationary reference marking formed on the stationary structure of the frame in order to further the speedy adjustment and reading of the location of the nippers with reference to the circular comb.

References Cited in the file of this patent UNITED STATES PATENTS 1,382,893 Clegg June 28, 1921 2,483,931 Pierrepont Oct. 4, 1949 FOREIGN PATENTS 802,647 France June 13, 1936 879,782 France Nov. 30, 1942 145,181 Great Britain July 2, 1920 360,159 Great Britain Nov. 5, 1931 

1. IN A RECTILINEAR FRAME FOR COMBING LONG FIBRES HAVING A STATIONARY STRUCTURE, AND FIBRE NIPPERS COMPRISING A LOWER JAW AND AN UPPER JAW MOVABLE WITH RESPECT TO SAID LOWER JAW, A SUPPORT FOR SUSTAINING EACH END OF SAID FIBER NIPPERS, A COOPERATING CIRCULAR COMB ARRANGED BELOW THE END PORTION OF SAID LOWER JAW, MEANS FOR SUSTAINING SAID SUPPORT IN SAID STATIONARY STRUCTURE AND FOR SPEEDY ADJUSTMENT OF THE POSITION OF THE FIBRE NIPPERS ABOVE THE CIRCULAR COMB, SAID MEANS COMPRISING A MOVABLE INTERMEDIATE MEMBER INTERPOSED BETWEEN EACH OF SAID SUPPORTS AND SAID STATIONARY STRUCTURE, AND MEANS FOR LOCKING SAI INTERMEDIATE MEMBER IN A POSITION CORRESPONDING TO A DESIRED HEIGHT OF SAID NIPPERS ABOVE THE CIRCULAR COMB, A SCALE ON SAID INTERMEDIATE MEMBER GAUGED IN THE HEIGHTS OF SAID NIPPERS ABOVE SAID CIRCULAR COMB, AND A MARKING ON SAID STATIONARY STRUCTURE FOR COOPERATING WITH SAID SCALE. 